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Prediction markets put a live probability on almost anything, which makes them a rich signal for an agent — if it can read them. Polymarket and Kalshi expose different APIs, use different identifiers and quote in different units, and matching the same question across the two is manual work. Through AgentKey your agent reads both platforms the same way — find_tools, describe_tool, execute_tool — with Surf behind the scenes, including analytics that already line the two up.

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What you can ask

  • “What are the odds on Polymarket for this event, and how have they moved this month?”
  • “Find the same election market on Polymarket and Kalshi and tell me the price spread.”
  • “Which prediction markets have the most volume this week?”
  • “What is smart money betting on in the politics category?”
  • “Show the order book for this Kalshi market.”
  • “Who are the top Polymarket traders by realized PnL?”
  • “这个钱包在 Polymarket 上持有哪些仓位？”
  • “Which crypto-category markets move together?”

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What’s covered

Discovery
  • Browse and search markets across platforms by platform, category, status, keyword and smart-money direction, with volume, open interest, trade counts and smart-money signals per result
  • Polymarket events with nested markets and two-sided outcomes; Polymarket markets by slug
  • Kalshi events with nested markets; Kalshi markets with price, volume and status
Prices and order books
  • Polymarket price history as one point per interval, or as OHLCV candles for charting
  • Kalshi price history as daily or hourly OHLC, or the latest price from recent trades
  • Historical order book snapshots — raw bid/ask depth on Polymarket, yes-side bid/ask levels on Kalshi
Volume, open interest and trades
  • Volume history on both platforms, and a YES/NO volume split per hour, day or week on Polymarket
  • Daily open interest history on both platforms
  • Individual trades — on Polymarket filtered by market, wallet, outcome, minimum size and time range, including splits, merges and redemptions; on Kalshi filtered by taker side, minimum contracts and date range
Traders and smart money
  • Polymarket leaderboard ranked by realized PnL, volume or trade count, with wallet addresses
  • Smart-money positioning per market — net bullish or bearish signal and conviction — and the individual large smart-wallet trades behind it
  • Open positions of one wallet on Polymarket
Analytics and cross-platform
  • Platform-wide totals of volume, open interest and market count; trends, top markets, momentum distribution and per-market momentum signals, by category or across everything
  • 30-day price correlations between Polymarket markets within a category, covering the highest-volume markets
  • Matched Polymarket–Kalshi pairs for the same event with live price spread, and a daily volume and open interest comparison for a matched pair

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How to use it

Pass the request in plain language and let the router pick the tool:
Both English and Chinese phrasing work. Always describe_tool before executing — Polymarket tools key on condition ids and slugs, Kalshi tools on event and market tickers, and the per-call cost is shown there.
Building with code? Prediction market data is available through the catalog today; there is no dedicated Scenario Method yet. See Scenario Methods for the fixed-contract API and the methods that exist.

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FAQ

Polymarket and Kalshi, individually and through the cross-platform search, analytics and pair-matching tools that span both.
No. Every tool is read-only: markets, prices, order books, trades and positions are observed, never created.
Yes — price history and candles, order book snapshots, volume and open interest series and trade records are all time series. Market listings, leaderboards and smart-money positioning are fetched at request time.